body, html {
    height: 100%;
    margin: 0;
}
  
.bg {
    /* The image used */
    background-image: url("images/background.jpg");

    /* Full height */
    height: 100%;

    /* Center and scale the image nicely */
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

.caption {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    text-align: center;
    color: #000;
    background-color: #111;
    color: rgb(212, 212, 212);
    padding: 18px;
    font-size: 15px;
    letter-spacing: 3px;
}